Features: 
◆Supports broadcasting at a scheduled time. 
◆Real-time paging: supports real-time paging function. 
◆Background music playback: supports background music playback. 
◆Protocol : IP/TCP, SIP, UDP, IGMP (multicast), 4G,etc. 
◆Audio encoding/decoding: supports audio encoding/decoding in the range of 8K-48K. 
◆NVR system access: support standard ONVIF protocol and SIP protocol: can be seamlessly accessed with the NVR system. 
◆Audio storage: supports audio storage in the NVR system. 
◆Standard 10/100m RJ45 network interface. 
◆Built-in digital amplifier, low heat and high efficiency. 
◆Built in POE power supply or external DC12V power supply.